• I A Khan

      Articles written in Journal of Chemical Sciences

    • Some lanthanide metal complexes of n-isonicotinamidosalicylaldimine

      T R Rao I A Khan R C Aggarwal

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      Trivalent lanthanide complexes of the type K[ML2] whereM=La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III) and Dy(III) and H2L=N-isonicotinamidosalicyladimine, have been prepared and characterised. The nephelauxetic ratio (β), covalency (δ) and bonding parameter (b2) of K[NdL2] have been calculated. Infrared spectral studies reveal that N-isonicotinamidosalicylaldimine acts as a dibasic tridentate ligand. A coordination number six has been proposed for the lanthanide metal ions.

    • Some trivalent lanthanide complexes of I-tyrosine hydrazide

      T R Rao I A Khan

      More Details Abstract Fulltext PDF

      Tyrosine hydrazide (TH) has been found to form complexes of the types [M(TH)3Cl2]Cl [M=La(III), Pr(III), Nd(III)] and [M′(TH)2Cl2]Cl [M′=Sm(III), Eu(III), Gd(III) and Dy(III)]. The complexes have been characterized by elemental analysis, molar conductance, magnetic susceptibility, infrared, electronic and PMR spectral studies. The nephelauxetic ratio (β), covalency (δ) and bonding parameter, (b1/2) of [Nd(TH)3Cl2]Cl have been calculated. Infrared spectral studies reveal that TH acts as a neutral bidentate ligand. Coordination numbers of eight around La(III), Pr(III) and Nd(III) and six around Sm(III), Eu(III), Gd(III) and Dy(III) have been proposed in the complexes.

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